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As the March Brexit deadline looms, the Eurotunnel teams at both ends of the channel tunnel are on a mission to keep everything moving: getting dog owners home after Crufts, keeping trucks moving despite strikes at French customs, and making sure the trains keep circulating, no matter what, on the world’s busiest and biggest trainset. We see inside Eurotunnel’s mission control centre, a lair any Bond villain would be proud of. And we meet the appropriately named Tash Speed, one of the company’s newest train drivers, who’s already earned the nickname Two Stop Tash for her daily habit of stopping the train just a little too soon. Meanwhile, the once-every-seven-year fan refurbishments at either end of the tunnel are under way. Airflow through the service tunnel, between the two running tunnels, is essential. Without it no trains will run. We find out why high-pressure air has to keep pumping, and how the giant fans at Sangatte in France and Samphire Hoe in England, get overhauled. And why, on the English side, the workers need a good head for heights. Finally, as Brexit rumbles on and deadlines approach and pass, we find out how the tunnel has prepared for the dreaded No Deal Scenario. Is the tunnel really ready?